linux-kernel - Re: [PATCH 4/7] ECHI Platform: Merge ppc-of EHCI driver into the ehci-platform driver

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Date:	Mon, 24 Feb 2014 11:28:01 +1100
From:	Alistair Popple <alistair@...ple.id.au>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, Tony Prisk <linux@...sktech.co.nz>,
	Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 4/7] ECHI Platform: Merge ppc-of EHCI driver into the ehci-platform driver

On Fri, 21 Feb 2014 10:41:50 Alan Stern wrote:
> On Fri, 21 Feb 2014, Alistair Popple wrote:
> > Currently the ppc-of driver uses the compatibility string
> > "usb-ehci". This means platforms that use device-tree and implement an
> > EHCI compatible interface have to either use the ppc-of driver or add
> > a compatible line to the ehci-platform driver. It would be more
> > appropriate for the platform driver to be compatible with "usb-ehci"
> > as non-powerpc platforms are also beginning to utilise device-tree.
> > 
> > This patch merges the device tree property parsing from ehci-ppc-of
> > into the platform driver and adds a "usb-ehci" compatibility
> > string. The existing ehci-ppc-of driver is removed and the 440EPX
> > specific quirks are added to the ehci-platform driver.
> > 
> > Signed-off-by: Alistair Popple <alistair@...ple.id.au>
> 
> This patch is also out of date.  The compatibility string used by the
> ehci-platform driver is "generic-ehci".

Ok. I will switch to using "generic-ehci" in the Akebono device tree.

> There remains the question of whether to merge ehci-ppc-of into
> ehci-platform.  This would be a rather invasive change, but I suppose
> we could do it.  With adjustments along the lines suggested by Mark
> Rutland.

As I can use "generic-ehci" to support Akebono I will drop this patch. I can 
look at merging ehci-ppc-of at some later date if desired (thanks Mark & Tony 
for reviewing though).

- Alistair

> Alan Stern
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